Water Quality: Casper, WY
14 water systems • 66,524 people served
Multiple Health ViolationsWater Quality Summary
Casper is served by 14 public water systems with a combined service population of 66,524 people, and has 192 EPA Safe Drinking Water Act violations on record. Critically, 13 of those are health-based violations, meaning one or more contaminants were detected above EPA-established safe levels — a serious public health concern. Casper's violation count is 50% above the national average for Wyoming. Contaminants associated with violations include Disinfection Byproducts, Fecal Coliform.
Contaminants Found
Broad category of chemicals formed during disinfection, associated with increased cancer risk and adverse reproductive effects.
Common source: Reaction of disinfectants (chlorine, ozone, chloramines) with organic matter
Indicates direct fecal contamination; associated with diarrhea, cramps, nausea, and potential severe illness.
Common source: Human and animal fecal waste
EPA limit: Zero tolerance (any positive triggers violations)
Water Systems Serving Casper
| System Name | PWSID | Source | Population | Violations |
|---|---|---|---|---|
| CASPER, CITY OF | WY5601415 | Surface Water | 59,000 | 0 |
| EVANSVILLE, TOWN OF | WY5600018 | Surface Water | 2,728 | 6 |
| VISTA WEST WATER COMPANY | WY5600069 | Surface Water | 1,600 | 6 |
| PIONEER WATER & SEWER DISTRICT | WY5600828 | Surface Water | 1,500 | 11 |
| NATRONA COUNTY INT'L AIRPORT | WY5600079 | Surface Water | 375 | 34 |
| RIVERSIDE MOBILE HOME COURT | WY5601641 | Surface Water | 330 | 9 |
| AIR BASE ACRES I&S DISTRICT | WY5600080 | Surface Water | 236 | 6 |
| POISON SPIDER I&S DISTRICT | WY5600073 | Surface Water | 200 | 6 |
| LEX MOBILE HOME PARK | WY5601742 | Groundwater | 172 | 2 |
| SANDY LAKE ESTATES I&S DISTRICT | WY5601581 | Surface Water | 150 | 6 |
| PLEASANT VIEW WATER COMPANY | WY5600082 | Surface Water | 130 | 3 |
| MILE-HI I&S DISTRICT | WY5601645 | Surface Water | 48 | 4 |
| BROKEN WRENCH LLC | WY5600074 | Groundwater | 30 | 99 |
| CENTRAL WY REGIONAL WATER SYSTEM JPB | WY5600009 | Surface Water | 25 | 0 |
Concerned About Your Water?
A home water filter can remove common contaminants. NSF-certified filters are tested against EPA standards.
Consider a reverse osmosis system for comprehensive filtration or a carbon filter for basic improvement.
Other Cities in Wyoming
Data Sources
Drinking water violation data from the EPA Safe Drinking Water Information System (SDWIS). Data includes all recorded violations for active community water systems.